All-time weather records — Chelsea, SD

Record high
114.1°F
August 13, 1965
Record low
-63.9°F
June 27, 1921
Wettest day
6.75 in
May 6, 2007

Climate change signal in Chelsea

1.9%

of Chelsea's all-time daily heat records were set in the last decade (7 of 366 records since 2015).

0.8%

of all-time daily cold records were set in the last decade (3 of 366 records since 2015).

If records were spread evenly across the station's history, you'd expect roughly 5% per decade. Decade-by-decade, here's where each record-breaking day was set:

Decade Heat records set # Cold records set #
1890s
12
37
1900s
28
44
1910s
22
53
1920s
24
31
1930s
86
29
1940s
34
33
1950s
27
24
1960s
15
31
1970s
22
31
1980s
33
19
1990s
20
15
2000s
25
8
2010s
18
11

Records are the all-time daily extremes that are still standing — each daily record can only be held by one year. The station's earliest hot record was set in 1895, the latest in 2016. Period of observation: 1893-2017.

Records by month

Month Hottest day Coldest day Wettest day
January 63.0°F — Jan 25, 1981 -45.0°F — Jan 12, 1912 2.23 in — Jan 9, 1939
February 71.1°F — Feb 25, 1958 -45.0°F — Feb 9, 1994 1.28 in — Feb 27, 1958
March 87.1°F — Mar 21, 1910 -29.0°F — Mar 13, 1897 2.00 in — Mar 28, 1900
April 99.0°F — Apr 22, 1980 -45.9°F — Apr 22, 1942 2.85 in — Apr 13, 1912
May 108.0°F — May 30, 1934 15.1°F — May 10, 1981 6.75 in — May 6, 2007
June 109.9°F — Jun 25, 1988 -63.9°F — Jun 27, 1921 3.90 in — Jun 16, 1935
July 113.0°F — Jul 16, 2006 34.0°F — Jul 3, 1917 3.10 in — Jul 3, 1919
August 114.1°F — Aug 13, 1965 32.0°F — Aug 20, 1907 4.59 in — Aug 20, 1984
September 106.0°F — Sep 10, 1931 16.0°F — Sep 29, 1899 5.50 in — Sep 2, 1926
October 96.1°F — Oct 6, 1905 -8.0°F — Oct 28, 1919 3.52 in — Oct 17, 1998
November 79.0°F — Nov 9, 1999 -26.0°F — Nov 30, 1905 1.28 in — Nov 17, 1952
December 68.0°F — Dec 6, 1939 -41.1°F — Dec 19, 2016 1.22 in — Dec 26, 2016

Click a month to see every daily record for that month in Chelsea.